1 Ganglia-groups of neuron cell bodies that lie peripheral to the central nervous system in vertebrates. 2  Bipolar neurons-cell body located near the middle of the axon; characteristic of retinal neurons. 3  Unipolar neurons-cell body lies off to one side of axon; characteristic of sensory neurons.
The principal host for diamonds are rocks formed in the earth's mantle that are known as eclogite and peridotite that are carried to the earth's surface in magmas known as kimberlit e and lamproite.
Remarkable facts: 1  All diamonds are at least 990,000,000 years old. 2  Diamonds are formed deep within the Earth: between 100 km and 200 km below the surface. 3  The temperatures are about 900 - 1300 C in the part of the Earth's mantle where diamonds form. 4  The pressure is between 45 - 60 kilobars.